» CalFlora    Database containing summary geographic and ecological distribution information for over 8000 California vascular plant taxa, as well as additional habitat information for rare species of the Sierra Nevada.    http://www.calflora.org/

» California Botanical Society    Systematics, ecology, evolution, and natural history of the plants of California and adjacent western North America. Publisher of the journal Madroño.    http://www.calbotsoc.org/

» California Exotic Pest Plant Council    Dedicated to finding solutions to problems caused by non-native pest plant invasions of the state's natural areas.    http://www.cal-ipc.org

» California Native Plant Society    Non-profit organization dedicated to the preservation of California native plants through scientific activities, education, and conservation.    http://www.cnps.org

» California Urban Forests Council    Vigorously advocates for a holistic, ecosystem approach to the practice of urban forestry, especially when influencing public policy and decision makers. Offers a newsletter, forest professional certification, publications, and general informational mate    http://www.caufc.org/

» California Wildflowers    Look-up photos and descriptions of California wildflowers by color, common name, Latin name or family.    http://www.calacademy.org/research/botany/wildflow/index.html

» Las Pilitas    Advice and resources on gardening with native plants in California.    http://www.laspilitas.com/

» Sudden Oak Death    Created by the University of California's Sudden Oak Death Research Team, this site addresses the increasing number of oak trees in California that are dying from the fungal disease Phytophthora, and the effects the infestation is having on f    http://kellylab.berkeley.edu/

» The Watershed Nursery    Provides plants native to the San Francisco Bay/Delta watershed, for habitat restoration projects. Contract growing and collection of site-specific gene-stock, also available.    http://home.earthlink.net/~thewatershednursery/